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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes

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Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv

Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
This commit is contained in:
Coleen Phillimore 2008-04-13 17:43:42 -04:00
parent 680ecf1611
commit 4a831d45f0
273 changed files with 6585 additions and 2993 deletions
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14
hotspot/src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp
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@ -65,16 +65,18 @@ public:
assert(_promotion_manager != NULL, "Sanity");
}
void do_oop(oop* p) {
assert (*p != NULL, "expected non-null ref");
assert ((*p)->is_oop(), "expected an oop while scanning weak refs");
template <class T> void do_oop_work(T* p) {
assert (!oopDesc::is_null(*p), "expected non-null ref");
assert ((oopDesc::load_decode_heap_oop_not_null(p))->is_oop(),
"expected an oop while scanning weak refs");
oop obj = oop(*p);
// Weak refs may be visited more than once.
if (PSScavenge::should_scavenge(obj, _to_space)) {
if (PSScavenge::should_scavenge(p, _to_space)) {
PSScavenge::copy_and_push_safe_barrier(_promotion_manager, p);
}
}
virtual void do_oop(oop* p) { PSKeepAliveClosure::do_oop_work(p); }
virtual void do_oop(narrowOop* p) { PSKeepAliveClosure::do_oop_work(p); }
};
class PSEvacuateFollowersClosure: public VoidClosure {
@ -83,7 +85,7 @@ class PSEvacuateFollowersClosure: public VoidClosure {
public:
PSEvacuateFollowersClosure(PSPromotionManager* pm) : _promotion_manager(pm) {}
void do_void() {
virtual void do_void() {
assert(_promotion_manager != NULL, "Sanity");
_promotion_manager->drain_stacks(true);
guarantee(_promotion_manager->stacks_empty(),